//
// Created by zhangrongxiang on 2017/10/12 12:50
// File client
//

#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <string.h>
#include <unistd.h>

#define BUFSIZE 1024

int main(int argc, char *argv[]) {
    int client_sockfd;
    int len;
    struct sockaddr_in remote_addr; //服务器端网络地址结构体
    char buf[BUFSIZE];  //数据传送的缓冲区
    memset(&remote_addr, 0, sizeof(remote_addr)); //数据初始化--清零
    remote_addr.sin_family = AF_INET; //设置为IP通信
    remote_addr.sin_addr.s_addr = inet_addr("127.0.0.1");//服务器IP地址
    remote_addr.sin_port = htons(8000); //服务器端口号

    /*创建客户端套接字--IPv4协议，面向连接通信，TCP协议*/
    if ((client_sockfd = socket(PF_INET, SOCK_STREAM, 0)) < 0) {
        perror("socket");
        return 1;
    }

    /*将套接字绑定到服务器的网络地址上*/
    if (connect(client_sockfd, (struct sockaddr *) &remote_addr, sizeof(struct sockaddr)) < 0) {
        perror("connect");
        return 1;
    }
    printf("connected to server\n");
    len = recv(client_sockfd, buf, BUFSIZE, 0);//接收服务器端信息
    buf[len] = '\0';
    printf("%s", buf); //打印服务器端信息

    /*循环的发送接收信息并打印接收信息--recv返回接收到的字节数，send返回发送的字节数*/
    while (1) {
        printf("Enter string to send:");
        scanf("%s", buf);
        if (!strcmp(buf, "quit"))
            break;
        len = send(client_sockfd, buf, strlen(buf), 0);
        len = recv(client_sockfd, buf, BUFSIZE, 0);
        buf[len] = '\0';
        printf("server say:%s\n", buf);
    }
    close(client_sockfd);//关闭套接字
    return 0;
}